package com.sky.service.impl;

import com.github.pagehelper.Page;
import com.github.pagehelper.PageHelper;
import com.sky.constant.MessageConstant;
import com.sky.constant.PasswordConstant;
import com.sky.constant.StatusConstant;
import com.sky.context.BaseContext;
import com.sky.dto.EmployeeDTO;
import com.sky.dto.EmployeeLoginDTO;
import com.sky.dto.EmployeePageQueryDTO;
import com.sky.entity.Employee;
import com.sky.exception.AccountLockedException;
import com.sky.exception.AccountNotFoundException;
import com.sky.exception.PasswordErrorException;
import com.sky.mapper.EmployeeMapper;
import com.sky.result.PageResult;
import com.sky.service.EmployeeService;
import org.springframework.beans.BeanUtils;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;
import org.springframework.util.DigestUtils;

import java.time.LocalDateTime;
import java.util.List;

@Service
public class EmployeeServiceImpl implements EmployeeService {

    @Autowired
    private EmployeeMapper employeeMapper;

    /**
     * 员工登录
     *
     * @param employeeLoginDTO
     * @return
     */
    public Employee login(EmployeeLoginDTO employeeLoginDTO) {
        String username = employeeLoginDTO.getUsername();
        String password = employeeLoginDTO.getPassword();

        //1、根据用户名查询数据库中的数据
        Employee employee = employeeMapper.getByUsername(username);

        //2、处理各种异常情况（用户名不存在、密码不对、账号被锁定）
        if (employee == null) {
            //账号不存在
            throw new AccountNotFoundException(MessageConstant.ACCOUNT_NOT_FOUND);
        }

        //密码比对
        // 对前端传过来的明文密码进行md5加密处理 -参数是以字符数组的形式出现
        password = DigestUtils.md5DigestAsHex(password.getBytes());
        if (!password.equals(employee.getPassword())) {
            //密码错误
            throw new PasswordErrorException(MessageConstant.PASSWORD_ERROR);
        }

        if (employee.getStatus() == StatusConstant.DISABLE) {
            //账号被锁定
            throw new AccountLockedException(MessageConstant.ACCOUNT_LOCKED);
        }

        //3、返回实体对象
        return employee;
    }


    /**
     * 新增员工
     *
     * @param employee 新增的员工信息
     */
    @Override
    public void save(EmployeeDTO employee) {
        // 查看当前请求被哪个线程处理
        System.out.println("当前线程的id:" + Thread.currentThread().getId());
        Employee emp = new Employee();

        // 使用BeanUtils将一个对象的属性值赋值给另一个对象的属性(前提是两个对象的属性名一致)
        BeanUtils.copyProperties(employee, emp);

        //设置账号的状态，默认正常状态 1表示正常 0表示锁定
        emp.setStatus(StatusConstant.ENABLE);

        //设置密码，默认密码123456
        emp.setPassword(DigestUtils.md5DigestAsHex(PasswordConstant.DEFAULT_PASSWORD.getBytes()));

        //设置当前记录的创建时间和修改时间
        emp.setCreateTime(LocalDateTime.now());
        emp.setUpdateTime(LocalDateTime.now());

        //设置当前记录创建人id和修改人id
        emp.setCreateUser(BaseContext.getCurrentId());
        emp.setUpdateUser(BaseContext.getCurrentId());

        // 插入一条员工数
        employeeMapper.insert(emp);
    }


    /**
     * 员工分页查询
     *
     * @param employeePageQueryDTO 接收前端传送过来的数据
     * @return 回操作结果的具体信息
     */
    @Override
    public PageResult pageQuery(EmployeePageQueryDTO employeePageQueryDTO) {
        // select * from employee limit 0,10
        //开始分页查询
        PageHelper.startPage(employeePageQueryDTO.getPage(), employeePageQueryDTO.getPageSize());
        // 将获取到的查询结果封装成一个实体类
        Page<Employee> page = employeeMapper.pageQuery(employeePageQueryDTO);
        // 从实体类中获取总记录数，当前页的数据并响应给前端
        long total = page.getTotal();
        List<Employee> records = page.getResult();

        return new PageResult(total, records);
    }



    /**
     * 启用禁用员工账号
     *
     * @param status 账号状态
     * @param id     员工id
     */
    @Override
    public void startOrStop(Integer status, long id) {
        // 将参数封装成一个对象 ->第一种方式
//        Employee employee = new Employee();
//        employee.setStatus(status);
//        employee.setId(id);

        // 使用构造器 ->第二种方式
        Employee employee = Employee.builder()
                .status(status)
                .id(id)
                .build();
        employeeMapper.update(employee);
    }


    /**
     * 根据id查询员工信息
     * @param id 员工id
     * @return 返回操作结果的具体信息
     */
    @Override
    public Employee getById(long id) {
        Employee employee=employeeMapper.getById(id);
        employee.setPassword("****");   // 重新设置密码防止出现泄露
        return employee;
    }

    /**
     * 编辑员工信息
     * @param employeeDTO 要修改的员工信息
     */
    @Override
    public void update(EmployeeDTO employeeDTO) {
        Employee employee=new Employee();
        BeanUtils.copyProperties(employeeDTO,employee);

        employee.setUpdateTime(LocalDateTime.now());
        employee.setUpdateUser(BaseContext.getCurrentId());

        employeeMapper.update(employee);
    }

    @Override
    public void delete(long id){
        if (id==1){
            return;
        }
        employeeMapper.delete(id);
    }
}
